class Course(db.Model):
__tablename__ = 'course'
course_id = db.Column(db.Integer, primary_key=True)
crn = db.Column(db.String(5))
name = db.Column(db.String(50))
course_code = db.Column(db.String(10))
credit = db.Column(db.String(3))
instructor_id = db.Column(db.Integer,
db.ForeignKey('instructor.instructor_id'))
department_id = db.Column(db.Integer,
db.ForeignKey('department.department_id'))
courseOutcomes = db.relationship('Course_Outcome',
backref='course',
cascade="all, delete-orphan",
lazy=True)
grades = db.relationship('Student_Grade',
backref='course',
cascade="all, delete-orphan",
lazy=True)
requisites = db.relationship(
'Prerequisite',
primaryjoin=
"or_(Course.course_id==Prerequisite.course_id, Course.course_id==Prerequisite.requisite_id)",
cascade="all, delete-orphan",
lazy='dynamic')
def __repr__(self):
return f"course('{self.crn}', '{self.name}', '{self.course_code}', '{self.instructor_id}')"
class Department(db.Model):
__tablename__ = 'department'
department_id = db.Column(db.Integer, primary_key=True)
department_name = db.Column(db.String(50))
faculty_name = db.Column(db.String(50))
users = db.relationship('RegUser', backref='department', lazy=True)
courses = db.relationship('Course', backref='department', lazy=True)
def __repr__(self):
return f"department('{self.department_name}', '{self.faculty_name}')"
class RegUser(db.Model, UserMixin):
__tablename__ = 'reguser'
user_id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(30))
surname = db.Column(db.String(30))
email = db.Column(db.String(50), nullable=False)
password = db.Column(db.String(100), nullable=False)
user_type = db.Column(db.Integer, default=0)
department_id = db.Column(db.Integer,
db.ForeignKey('department.department_id'),
nullable=False)
instructor = db.relationship('Instructor',
backref='reguser',
single_parent=True,
cascade="all, delete-orphan",
uselist=False)
student = db.relationship('Student',
backref='reguser',
single_parent=True,
cascade="all, delete-orphan",
uselist=False)
def get_id(self):
return (self.user_id)
def isAdmin(self):
if (self.user_type == 0):
return True
else:
return False
def isInstructor(self):
if (self.user_type == 1):
return True
else:
return False
def isStudent(self):
if (self.user_type == 2):
return True
else:
return False
def __repr__(self):
return f"reguser('{self.name}', '{self.surname}', '{self.email}', '{self.password}', '{self.user_type}'), '{self.department_id}"
class Outcome(db.Model):
__tablename__ = 'outcome'
outcome_id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(30))
courseOutcomes = db.relationship('Course_Outcome',
backref='outcome',
cascade="all, delete-orphan",
lazy=True)
def __repr__(self):
return f"outcome('{self.name}')"
class Student(db.Model):
__tablename__ = 'student'
id_number = db.Column(db.String(9))
student_id = db.Column(db.Integer,
db.ForeignKey('reguser.user_id'),
nullable=False,
primary_key=True)
grades = db.relationship('Student_Grade',
backref='student',
cascade="all, delete-orphan",
lazy=True)
def __repr__(self):
return f"student('{self.id_number}')"
class Instructor(db.Model):
__tablename__ = 'instructor'
title = db.Column(db.String(50))
instructor_id = db.Column(db.Integer,
db.ForeignKey('reguser.user_id'),
nullable=False,
primary_key=True)
courses = db.relationship('Course',
backref='instructor',
cascade="all, delete-orphan",
lazy=True)
def __repr__(self):
return f"instructor('{self.title}')"